docs: def executemany(self, sql, *params):
          """Prepare a database query or command and then execute it against
          all parameter sequences  found in the sequence seq_of_params.
  
          :param sql: the SQL statement to execute with optional ? parameters
          :param params: sequence parameters for the markers in the SQL.
          """
          fut = self._run_operation(self._impl.executemany, sql, *params)
          return fut